Lock



June 11,v 1935. J, w. Frrz GERALD Loox Filed oct. 17, 1934 Ik y /f/ /63 umuunuumumummv/a M' Patented June 11, 1935 l d Y "ya, .K l .-`rc`2,00`4433`17f1 V)LOCKQ "John W. Fitz Gerald. Milw uiieegivis.,` assignor to Briggsdt. Stratton Corporation, Milwaukee, iWis., acorporation'of Delaware j fl Application October y17, 1934;? Serial No. 748,655 ,y ,e e y. j vi3 claims. (clito-46) Y e l `This invention relates `to improvementsin locks, FigureZ is across sectionvievv through Figure 1 and refers `more particularly to cylinder locks1of on the plane ofthe line 2`-2,'-` the type shown in `Patent No.j1,965,336,issuedfto I Figure-3 is a perspective'view `'of one of the t John W. Fitz Gerald, July 3, 1934. j x j tumblers; and y f f5 As in 'the aforesaid patent,l the cylinder `is 4,Figure 4 `is an enlarged detail view showing a i5 secured against rotationin its mounting member fraginfent *ofthe cylinder in' elevation `to more or casing by a locking member. projected radially clearlyillustrate the relationship of the tumblers from the cylinder into lockingVr engagement `with totheir guidevvays in the cylinder. the mounting member or' casing by the key oper` Referring novv more particularly to the accom-` abletuinblers.` i panying drawing, in Which-like numerals indicate 10 The tumblers have notches in their'side edges like; parts throughout the severalyiews, the nuwhich the :locking member is received lwhen meraliV designatesa mounting Viiiemberor casing thetumblers are `all moved to predetermined posibo ed as at f6 to receiveacylinder 1. As is cus' i tions bya proper key,.to free the locking `member. tornaryl'jthecylinder has a stem 8 projecting from from locking engagement vvith1 the mounting its rearendto drivinglyconnect the samevwith 15A f member. These notches are cutinto the tumblers lock` mechanism r(not` shown), e after they are assembled with theucylinderi'and Communicating with the] bore G isi a longie in their formation, burrs are generally left onthe tudinal groove V9 into which a locking member sides ofthe tumblers`,'which heretofore obstructed (1 carried by the cylinder projects'to securethe 2X0 the free movement of the tumblers and in'geneial cylinder fagainst rotation. The locking member 2o prevented. the. desiredisrnooth operation. i `il) is inthe formiof a atibarsub'stantially rectan- It is, therefore, an object offthis inventionto gular in cross section and slidably mounted in provide a cylinder so Vconstructed.thatthepres- `a lca'gfe or box lI l.. preferably formed' ofV sheet ence ofburrs on the sides of the tumblers .does not metaland secured in a radial pocket or'recess `l 2 iri lrliy 1iivaybfii'fect the smooth and free 'operation' formgd in theta sicleofthe.llglylnletilv the locllging 25` o e um ers. .1 i l x N 'mem erisreaine assem" e Wi iscage ya` `Another disadvantage found. in locks Vof this tang |3 struck inwardly from onewall of the cage type` has been the possibility of releasing the and entering an aperture 14 in the locking memcylinder for rotation'bycuttingthroughthe tumbei'. K o j i 3 f u blers `byfmeans ofatool `forced down intolthe The opposite endsfofvthe lockingmember are 3Q keyway, and it' is, therefore, another object 'of stepped as `at 5 and the .adjacent end walls of thisinvention to provide a lock ofthe character the cagehave inwardly directed tongues I6 bedesiriled bslojconstrcteddtilalt evlenbthoiigh all tv'veen whici ag@ tl'IllStePDed POITQSI' ljlsprings ...x1 o s um ers ares eare oug yfa ool in-v are con ne` .e i esprings "yie a y urge 3 serted. into `the keyw'ay, tneickirig membenwiu the locking member inwardlypf the cylinder and 35 stiiibe heid initseperative locking positienpre: inte engafimnfltlhte afgegcligrsde vening rotationof the cylinder. C 1 ey 91.98.13.. e. u e S t l .With the above and' other objects in view'which` mounted in gudewaysi 9 extending .diametricauy will appear asthe description proceeds, thisV inthrQugh thecyln'de' Substantially pelpellldcul.- 40` vention resides in thenovel construction, lcom 1yt0-the11fad1a1-ress '2, andicommpmcaftmg Wlth 40 bination and arrangement of parts substantially` the linerhpotll thereof-bt?" ,permltdthe .B rlgla.. i 'asherein'after described and more particularly mgm.; of Re! 0.0 n-g mem er Inner e ge W1 e l adiacent side edges ofthe tumblers. The regular dened by the appended clams 1t bemg under' kywayzu extends longitudinally downthe cyiin` stood. that such changes in the precise embodimentwof. the hereindisclosed invent10n. may ways I9, sothatupon `the insertion of a proper .madas com? Wlthm the teorie .of the clams: keyintq the .keywam airof the manners will bev The accompnymg drawfng lllusf'rajtes one com* actuated to predetermined positions as determined l plete example gf tliigedphysical embodimentfofthe by the contour of the key, 50 inven ion cons ruc e acc I S0'-"fa1 `devised fOI` the' practical'application ;of` shapedhavingsideportionsZl andl22`connected "the principles thereof, and in which:

- bya transverse portion 23, and as bestfshown in '-Figurel isa view partly in side elevation and' Figure 2,r `are allyieldably maintained in predepartlyin longitudinal section through a lock em`.` termined'positions by individual springs v24' bear-,j bodyi'ng this invention; M

der in` open communication with all of the guide- Ordiilg t0 the bBS'ITlOde f The individual tumblers; are substantially ,H- 50 ingon'` theytransverse portiorr2t` anda spring seat 55` 25 in the form of a bar extending longitudinally across the several tumbler guideways and secured to the cylinder in any suitable manner.

The movement of the tumblers by their springs 24 is limited by a stop 26 extending into the guideways and preferably in the form of a longitudinal bar extending the length of the keyway to provide a guide on which the key slides. p

In their normal spring projected positions, the edges of the side portions 22 of the tumblers engage the adjacent edge of the locking member,

which is bevelled or V-shaped as shown, and holdV the same outwardly in its projected position operatively engaging in the groove 9. Any one individual tumbler spring springsv l1, so that any one tumbler can hold the locking member in its operative position.

All of the tumblers have V-shaped notches 21 on their side edge portions 22 which, upon actuation of the tumblers to their proper key actuated positions, are all in line opposite the radial recess l2 to receive the locking member and permit the same tobe moved out of locking engagement with the groove 9 by its springs I1. y

Through the cam action afforded by the inclined sides of the .locking member inner edge and the sides of the V-shaped notches21, the freeing of the tumblers by the withdrawal of the key returns the locking member to its operative position, as Will be readily apparent.

The V-shaped notches` 21 are preferably cut into the tumblers after the tumblers are assembled with the cylinder, this being done by inserting a tool into the radial recess l2 and running the tool longitudinally of the cylinder to successively cut the notches in the tumblers, it being understood that the key is in position during this-cutting operation.

Invariably the formation of the notches-in this mannerA results in burrs which project from the sides of the tumblers and which ordinarily-would restrict the free movement of the tumblers in their guideways. To preclude such interference with the. free motion of the tumblers, the guideways I9 at their opposite sides and particularly that side which'communicates with the radial recess IE' and in which the operative side portions 22 of the tumblers are recived, arewidened as at 29. Consequently, even though burrs or other projections extend beyond the side faces of the tumblers,v their free action `in the guideways is not interfered with.

The widened portions of the guideways which receive the side portions 22 of the Vtumblers `extend inwardly beyond the bottoms of the V- shaped notches 2l to accommodate ribs 39 projecting from opposite faces of the tumblers directly inwardly of the V-shaped notches. These ribs 30 prevent the inward lateral displacement of the side portions 22 of the tumblersfrom their operative positionsin the event the transverse .connecting portions 23 are cut away by a shearing tool inserted down into the keyway 20, and thus positively prevent releasing the locking member and consequently freeing theV cylinder for rotation by so destroying the tumblers.

From the foregoing description taken in connection with the accompanying drawing, it willV be readily `apparent to those skilled in the art to which this invention appertains, that this invention materially improves the construction of cylinder locks of the type in 'which the cylinder is'` secured against rotation by a locking member projected from the side thereof into locking engagement with the mounting `member by not only 24 is stronger than the affording a smoother oper ting lock, but also adding to the security thereof by precluding release of the locking member upon forcible destruction of the tumblers.

What I claim as my invention is:

l. In a lock havinga cylinder provided with tumbler guideways, key operable tumblers slidable in said guideways, said tumblers having a formation apt to have burrs onthe sides thereof adjacent one edge, and said guideways having widened portions to accommodate such burrs, so that their presence does not interfere with the free action of the tumblers in the guideways.

2. In a lock of the character described, including a cylinder having 'transverse tumbler guideways communicating with a radial recess, a locking member radially movable in said recess and having its inner edge portion projectible into said tumbler guideways, key operable tumblers slidable in said guideways with their side edges adjacent the. radial recess engageable with .the adjacent edge of the locking membensaid side edge portions of` the tumblers having notches to receive the locking member, the formation of. said notches. leaving burrs on the opposite faces of the tumblers, and they guideways being enlarged at their portions receiving said sideedge portions of the tumblers to `accommodate any Vburrs projecting from their faces so that Vthe presence of such burrs does not interfere with the4 free action of the tumblers in the guideways. 3. In a lock, a cylinder having a transverse tumbler` guideway,r a tumbler slidable in. said guideway and said guideway having its extreme side portions throughout its length wider than the thickness of the tumbler to afford a clearance at the opposite faces of the side .edge portions of the tumblers.

4. In a lock, a lock cylinder having a transverse tumbler guideway,v a tumbler slidable in said guideway and having projections of indeterminable size on its opposite faces adjacent a side edge portion, andl said guideway .being enlarged at its portion which receives said side edge portion of the tumbler to accommodateA such projections from the side faces of the tumbler so that their presence doesnot interfere with the free sliding of the tumblerY in the guideway.

5. In a lock, a cylinder having a transverse tumbler guideway, guideway and having a key engageable portion accessible from a keyway' inthe cylinder and an operative portion at the side of the key engageable portion, and means to hold the' operative portion of the tumbler vinY its proper position in the guideway independently of any lother portion of the tumbler, so that in the event the key engaging portion of the tumbler issheared off from its operative portion, said operative portion remains in its proper position. j 5

6. In a lock, a lockcylinder having a` transverse tumbler guideway, a iiat plate-like tumbler slidable in the guideway with its opposite vside edge portions engaging thev opposite sides ofthe guideway, one of said side edge portions` of the tumbler being the operative portion .of the tumbler, said tumbler cylinder having a keyway so located that a key inserted therein engages a portion of the tumbler other than said operative side edge portion, and `means to hold saidoperative side edge portion in the guideway-independently of the other side edge portion ofthe tumbler so that upon destruction ofthe tumbler by a tool inserted into the keyway, said operative `a tumbler slidable in said in said guideway and having edge portion at one side of the guideway anda guiding portion engaged With the other side of the "of the tumbler by guideway and a recess intersecting the guideway,

the tumbler Ais retained in a locking member movable in the recess and projectible into the tumbler guideway, a key operable tumbler slidable inthe guideway With aside edge arranged to cross said recess to be engaged by the locking member, said locking member being held in its operative position by the tumblenand means to `hold the side edge portion of the tumblerin its position engageable with the locking member and against movement away from the locking member in the event of destruction shearing "its key engaging portion from said side edge portion.

8. In a lock having a lock )cylinder provided with a transverse tumbler guideway, a tumbler slidable in said guideway and having an operative edge portion of guideway being increased in Widthto accommodate the increased width of the operative edge portion and provide means to hold the edge portion of the tumbler the event of destruction of the tumblerresultlng in lossof support from the opposite edge of the guideway.

9. In a lock having a cylinder provided with a transverse tumbler guideway, a `tumbler in vsaid guideway having an operative edge portion at one side of the guideway, a lockingmember carried by the cylinder and operable by said edge portion of the tumbler, and means on said tumbler having a sliding interengagement with the Walls of the guideway `to hold the operative side edge portion of the tumbler in its proper operative position regardless of destruction of the tumbler resulting in loss of suppOrt from the side of the guideway opposite that in which the operative side edge portion ofthe tumbler is disposed,

10. In a lock having a cylinder provided with a transverse ytumbler guideway,

an operative side guideway, and ribs on the side of the operative side edge `portion of the tumbler slidable in an` enlargement of the guideway to hold the operative side `edge portion of the tumbler in its operative side n in the cylinder, whereupon the tumbler is subject increased thickness, and the in itsoperative position in .ledge portions' by a tool inserted aY tumbler slidable the guideway, said jacent the keyway lto the adjacent side position in the guideway regardless of destruction l of the tumbler resulting in removal of the guiding portionof the tumbler outofsupporting engagement `with its side of the guideway.

' 11. In a lock having tumbler guideway;

a cylinder provided with a a tumbler slidable in said 1 guideway, said tumbler having an operative side edge portion slidably engaging one sideY of the guideway, tion slidably` engaging the'otherside of theguide- Way, and a key engaging portion connecting said edge portions and accessible from akeyway to being sheared through to separateits side edge portions by a tool inserted into the keyway and `operating on the key engaging portion of the tumbler, andmeans an opposite supporting side edge por- 1 12. Ina lock having a cylinder provided with a tumbler guideway, a tumbler slidable in said guideway, said tumbler having an operative side edge portion slidablyengaging one side of the guideway,r `an opposite supporting side edge por- 'tion slidably engaging the other side ofthe guideway, and a key engaging portion connecting'said side edge portions and accessible `from a keyway in the cylinder, whereupon the tumbler is subject to being sheared through to separate its side and operatingon the key engaging portion of the tumbler, and inter-engaging abutments on the operative side edge portion of the tumbler and the adjacent Walls of the guideway to retain the operative side edgeportion of the tumbler in its into the keyway operative position within the guideway regardless l of such destruction of the tumbler.

13.1 In a lock, a cylinder having a longitudinal keyway, and a transverse tumbler guideway intersecting the keyvvay, a tumbler slidable endvvise of i guideway being of a width ad-y I to have guiding engagement with opposite faces of the tumbler adjacent the keyway and being of increased Width from a point spaced from the keyWay and extending along and edge of the guideway.

t JOHN W. FITZ GERALD. 

